The "h" indicates that the reference is to fannish deities. Art Rapp reports this to be the only genuine superstitious taboo known in the Microcosm. He points out its probable source: with intellectual maturity fans as a rule realize the dubious nature of evidence for a deity, but they've been so well inculcated in childhood with the various religious precepts against direct blasphemy that rejection of theism is sublimated in burlesque rather than manifested in militant forms. Fussiness over spelling God's name is a characteristic of Western religions, and such points of etiquette are natural objects for burlesque.